"""
Case Type   : 多块预读
Case Name   : 开启多块预读，匿名块中扫描表
Create At   : 2024/12/04
Owner       : @li-xin12345
Description :
    1、建表，重启
    2、执行匿名块全表扫描
    3、查看日志中打印的预读块数量
    4、清理环境
Expect      :
    1、成功
    2、成功
    3、预读了设置的块数量
    4、成功
History     :
"""
import os
import unittest

from yat.test import Node
from yat.test import macro

from testcase.utils.Common import Common
from testcase.utils.CommonSH import CommonSH
from testcase.utils.Constant import Constant
from testcase.utils.Logger import Logger


class SessionTest(unittest.TestCase):
    def setUp(self):
        self.log = Logger()
        self.log.info(f'-----{os.path.basename(__file__)} start-----')
        self.constant = Constant()
        self.common = Common()
        self.pri_sh = CommonSH('PrimaryDbUser')
        self.pri_user_node = Node('PrimaryDbUser')
        self.tb_name = 't_multi_bulk_read_0012'
        self.pg_log = \
            os.path.join(macro.PG_LOG_PATH, macro.DN_NODE_NAME.split('/')[0])

    def test_multi_bulk_read(self):
        text = '----step1: 建表，重启；expect: 成功----'
        self.log.info(text)
        sql = f'''drop table if exists {self.tb_name} cascade;
        create table {self.tb_name} (
            c_int int,
            c_char char(10),
            c_bool bool default false
        );
        insert into {self.tb_name}
        values (generate_series(1, 10000), 'char'||generate_series(1, 10000));
        '''
        res = self.pri_sh.execut_db_sql(sql)
        self.log.info(res)
        self.assertIn(self.constant.DROP_TABLE_SUCCESS, res, f'执行失败：{text}')
        self.assertIn(self.constant.CREATE_TABLE_SUCCESS,
                      res, f'执行失败：{text}')
        self.assertIn('INSERT 0 10000', res, f'执行失败：{text}')

        msg = self.pri_sh.restart_db_cluster()
        self.log.info(msg)
        status = self.pri_sh.get_db_cluster_status()
        self.assertTrue("Degraded" in status or "Normal" in status)

        text = '----step2: 执行匿名块全表扫描；expect: 成功----'
        self.log.info(text)
        sql = f'''set heap_bulk_read_size = 16;
        declare
        begin
            execute immediate 'select * from {self.tb_name};';
        end;
        '''
        res = self.pri_sh.execut_db_sql(sql)
        self.log.info(res)
        self.assertIn(self.constant.SET_SUCCESS_MSG, res, f'执行失败：{text}')
        self.assertIn(self.constant.ANONYMOUS_BLOCK_EXECUTE_SUCCESS_MSG,
                      res, f'执行失败：{text}')

        text = '----step3: 查看日志中打印的预读块数量；expect: 预读了设置的块数量----'
        self.log.info(text)
        cmd = f"cd {self.pg_log};" \
              f"ls -t | head -1 | awk '{{{{print $1}}}}' | " \
              f"xargs cat | tail -30 | " \
              f"grep 'End of pre-Read, the max blocks batch is'"
        self.log.info(cmd)
        res = self.common.get_sh_result(self.pri_user_node, cmd)
        self.log.info(res)
        self.assertIsNotNone(res, f'执行失败：{text}')

    def tearDown(self):
        text = '----step4: 清理环境;expect:成功----'
        self.log.info(text)
        sql = f"drop table if exists {self.tb_name} cascade;"
        res = self.pri_sh.execut_db_sql(sql)
        self.log.info(res)
        self.assertIn(self.constant.DROP_TABLE_SUCCESS, res, f'执行失败：{text}')
        self.log.info(f'-----{os.path.basename(__file__)} end-----')
